Do you guys use a paid USPS module for international shipping?

[Purity]

I think I'm at the point where I'd like to start accepting international orders, at least to Canada, but the original PS 1.6 module seems to lack this functionality. I don't necessarily mind paying for a module but do any of you use one or do you simply do your best to set it up manually? I imagine manually wouldn't be very accurate with box sizes, etc.

The modules available on the prestashop website don't seem very good, and I remember having troubles on 1.6 with even the PrestaShop coded USPS Pro one.

So, I'm wondering if you guys use a module for this, and if so which one?
Or if you guys do something else?